Research of welding hyperbaric arc electron density in TIG welding  

作　　者：焦向东 赵华夏 

机构地区：[1]School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617. [2]College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029.

出　　处：《China Welding》2010年第2期28-31,共4页中国焊接（英文版）

基　　金：Acknowledgement The authors wish to thank the financial support for this research from the National High Technology Research and Development Program of China （863 Program） （Grant No. 2002AA602012） and the National Natural Science Foundation of China （Grant No. 40776054）.

摘　　要：The arc spectrum of TIG welding in high pressure was analyzed by Stark broadening. Using the characteristic line of Arl in welding arc, a study of electron density in high pressure revealed that the electron density of the welding arc had an upward trend with the pressure increase. According to data analysis, a curve of relationship between electron density alwl environmental pressure was established. It has a universal significance for change of electron density in high pressure. Through the analysis of electron density changing in time-domain in different pressure, a theoretical basis was provided for the problem of poor arc stability in high pressure.The arc spectrum of TIG welding in high pressure was analyzed by Stark broadening. Using the characteristic line of Arl in welding arc, a study of electron density in high pressure revealed that the electron density of the welding arc had an upward trend with the pressure increase. According to data analysis, a curve of relationship between electron density alwl environmental pressure was established. It has a universal significance for change of electron density in high pressure. Through the analysis of electron density changing in time-domain in different pressure, a theoretical basis was provided for the problem of poor arc stability in high pressure.

关 键 词：TIG welding electron density arc spectrum Stark broadening 

分 类 号：TG457.19[金属学及工艺—焊接] O53[理学—等离子体物理]